Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4daf4a610bcc9d…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 04:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3f0cb897e1ddb46e73f82376f52c907 SHA-1: 4b2d20a94f861d7ab7253a97c7fd99edf72515f0 SHA-256: bc4daf4a610bcc9d5904c48e76d7d720d249e60bc9377e0cd387f59eafbc3422
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=dashboard+templates+html+free'. The document body, though heavily obfuscated, also contains this URL, suggesting the document's primary purpose is to trick users into visiting this malicious site, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=dashboard+templates+html+free
    • http://veferajor.tskjesusfreak.com/uploads/1/3/2/6/132680835/noxezafipewodabofome.pdf
    • http://dovijav.crappyclassics.com/uploads/1/3/0/9/130969774/66605298140.pdf
    • http://teleki.bedfordbiblechurch.com/uploads/1/3/1/8/131857252/ea8b0.pdf
    • http://files.gteanj.org/uploads/1/3/1/6/131636692/jomaguseragib.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/puranusasixumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/aggressive_behaviour_scale.pdf
    • https://cdn.shopify.com/s/files/1/0429/3607/4396/files/52913588631.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/kisukawogeradozalilivuzub.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/34318558171.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/musuvimoga.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/asteraceae_especies.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/buvofarukaripiroru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1089/9624/files/psychology_ciccarelli.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/conditional_operator_in_c_example.pdf
    • https://cdn.shopify.com/s/files/1/0460/1407/0945/files/gloomy_sunday_piano_sheet_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006137.bin
d6d37f4a766b4a227b647128fb28848acf2f72561cd1366f546dc4d188f2291c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6137 5420 bytes
font_01_sfnt_off00007374.bin
e1ec903ba9a7fd44698b69a8aa2472ee1de51c727b602a5f54d1254db93f95ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7374 9836 bytes